Project Checked-out JRE issue (unbound classpath container: ' JRE System Library [JavaSE-1.7] ' in Project ' Idweb ')

The project has reported many errors since SVN was checked out to the workspace, which is clearly a problem with some jars, no related jar or versioning issues, and the final error unbound classpath container: ' JRE System Library [ JavaSE-1.7] ' in Project ' Idweb ', it is clear that the JRE problem, the solution is as follows:

Project Right Key property--->java build Path--->libraries

Figure: Select the JRE System Library [javas3e1.7] and remove it,

Remove and then add the JRE again, as shown in the figure:

After entering the following figure, you can choose the workspace default JRE, you can also add the external, if you choose the default click Finish, if you add external, click the arrow pointing button, select the external JRE path address can be

When you are finished, you can see the following figure, the JRE is not in the error, click OK.

At this point, the problem has been solved, the story is finished.